Test Details

Acid Bases And Salt

Full Chapter

Nov 16, 7:20 PM

60 minutes

Nov 17, 8:00 PM

60.0 marks

MCQ

35 questions

Ritik Raj

Masters in Pharmacy

Class Details

Science

Class 10

Science

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Question Text

Question 2 :
When $NH_{3}(0.1\ M) 50\ ml$ mix with $HCl (0.1\ M)\ 10\ ml$ then what is $pH$ of resultant solution $(Pk_{b} = 4.75)$.

Question 4 :
Aquaregia is prepared by mixing conc. $HCl$ and $conc. HNO_3$ in the ratio ________ 

Question 5 :
Which of the following methods is adopted for preparing dilute solution of ${ H }_{ 2 }S{ O }_{ 4 }$?

Question 9 :
The solution of bleaching powder in water is always a clear solution.<br/>

Question 10 :
Which part of tooth, made up of calcium phosphate, is the hardest substance in the body?

Question 11 :
Assertion: pH of a neutral solution is always $7$. Reason: pH of a solution does not depend upon temperature.

Question 14 :
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?

Question 15 :
The hydrogen ion concentration of the oceans is about $2\times10^{-9}\space M$. What is the $pH$?

Question 16 :
The chloride salt of a certain weak monoacidic organic base is hydrolysed to an extent of $3$% in its $0.1M$ solution at ${25}^{o}C$. Given that the ionic product of water is ${10}^{-14}$ at this temperature, what is the dissociation constant of the base?

Question 17 :
Calculate the pH of a solution which is 0.1 M in HA and 0.5M in NaA. Ka for HA is $1.8\times { 10 }^{ -6 }$?

Question 19 :
If tartaric acid is not added in baking powder, the cake will taste bitter due to te presence of -

Question 23 :
Assertion: Sodium bicarbonate is an acidic salt. Reason: It gives basic solution in water.

Question 24 :
Bleaching powder should not be used for acidic water as it reacts with them to :

Question 25 :
Consider the following reactions:$CaCO_3\rightarrow CaO+CO_2$ <br> $E+CO_2\rightarrow F$ <br> $NaCl+F\rightarrow A+NaHCO_3$where $E$ and $F$ are respectively :

Question 26 :
The pH of a 10 ml aqueous solution of HCI is 4. The amount of water to be added to this solution in order to change its pH from 4 to 5 is

Question 29 :
Which of the following has the highest value of pH at the same temperature for the same concentration?

Question 30 :
Which one of the following processes does not occur during formation of $CH{ Cl }_{ 3 }$ from ${ C_2 H }_{ 5 }OH$ and bleaching powder?

Question 31 :
The aqueous solution of which one of the following is basic?

Question 33 :
The $pH$ at which a 0.01 M ${ Al }^{ +3 }$ solution is 99.99% precipitated is: $\left( { K }_{ sp } \ \ Al\left( OH \right) _{ 3 }=1\times { 10 }^{ -18 }at\quad 25 \right) $

Question 34 :
The $pH$ of a buffer solution containing equal molar concentration of a week base and its chloride ($K_{b}$ for weak base $=2\times 10^{-5}$) is :

Question 35 :
Percentage ionisation of water at certain temperature is $3.6\times { 10 }^{ -7 }$%. Calculate ${K}_{w}$ and $pH$ of water.

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